Method and apparatus for optimizing engine on/off cycling in a vehicle
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United States of America Patent
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Oct 16, 2012
Grant Date -
Mar 17, 2011
app pub date -
Sep 11, 2009
filing date -
Sep 11, 2009
priority date (Note) -
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Abstract
A method is provided for optimizing the cycling frequency between engine on/off states in a vehicle having a controller and auto start/auto stop functionality. The method includes detecting an engine state cycling event, measuring a plurality of vehicle operating values, and using the controller to optimize the cycling frequency via at least one of: automatically adjusting an interval between an auto start event and an auto stop event when each of a first set of the vehicle operating values exceeds a corresponding threshold, and temporarily inhibiting the auto start/auto stop functionality when any value in a second set of the vehicle operating values falls outside of a hysteresis band created around the second set. A vehicle includes an engine and a controller having an algorithm for optimizing the cycling frequency between engine on/off states as set forth above.
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